EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS

doi:10.1088/1004-423X/8/7/009

Abstract

Abstract Single-domain YBCO bulk superconductors have been fabricated by Top Seeded Melt Slow Cooling Growth(TSSCG) process. Two typical YBCO cylinder samples with differential grain-alignment were selected for the investigation of the relationship between the grain-alignment and the levitation force under the same testing condition at liquid nitrogen temperature. It is found that the levitation force values is much different for the two samples, the levitation force of the sample with H∥c-axis is more than two times higher than that of the samples with H⊥c-axis. So it is necessary to take account of this anisotropy in practical applications. The relationship between a magnet and a superconductor can be well described with a double exponential function. All the results are discussed in details.

Received: 05 November 1998
Revised: 28 December 1998
Accepted manuscript online:

PACS:	74.72.Bk
	74.25.Ha	(Magnetic properties including vortex structures and related phenomena)
	74.25.Op	(Mixed states, critical fields, and surface sheaths)
	81.20.-n	(Methods of materials synthesis and materials processing)

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Yang Wan-min (杨万民), Zhou Lian (周廉), Feng Yong (冯勇), Zhang Ping-xiang (张平祥), Wu Min-zhi (吴民智), Wu Xiao-zu (吴晓祖), W. Gawalek EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS 1999 Acta Physica Sinica (Overseas Edition) 8 533

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EFFECT OF GRAIN-ALIGNMENT ON THE LEVITATION FORCE OF MELT-PROCESSED YBCO BULK SUPERCONDUCTORS

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